Exposure to an increased level of air pollutants, especially nitrogen dioxide, has been associated with lower likelihoods of successful pregnancy among women undergoing in vitro fertilization, according to a team of fertility researchers.. The team examined the outcomes of the first pregnancy attempt of 7,403 women undergoing IVF at Penn State Milton S. Hershey Medical Center, Hershey, Pa.; Shady Grove Fertility, Rockville, Md.; and Columbia University College of Physicians and Surgeons, New York, N.Y. They conducted their observations over a seven-year period from 2000 to 2007.. "Numerous studies have consistently shown a relationship between air pollution and human health, ranging from mortality, cardiovascular disease and other chronic conditions," said Duanping Liao, Ph.D., professor of epidemiology and vice chair department of public health sciences, Penn State College of Medicine. "In the process of searching for the mechanisms responsible for the above associations, we, and others, have ...
New data from the Copernicus Sentinel-5P satellite reveal the decline of air pollution, specifically nitrogen dioxide concentrations, over Italy. This reduction is particularly visible in northern Italy which coincides with its nationwide lockdown to prevent the spread of the coronavirus.. The animation shows the fluctuation of nitrogen dioxide concentrations across Europe from 1 January 2020 until 11 March 2020. These data are thanks to the Tropomi instrument on board the Copernicus Sentinel-5P satellite which maps a multitude of air pollutants around the globe.. Claus Zehner, ESAs Copernicus Sentinel-5P mission manager, comments, "The decline in nitrogen dioxide concentrations over the Po Valley in northern Italy is particularly evident.. "Although there could be slight variations in the data due to cloud cover and changing weather, we are very confident that the reduction in concentrations that we can see, coincides with the lockdown in Italy causing less traffic and industrial ...
Nitrogen dioxide (NO2) can enhance both early and late airway narrowing after inhaled antigen in allergic asthmatic subjects. We hypothesized that NO2 may also increase airway inflammation during the late response. Nitrogen dioxide has been shown to cause airway inflammation in healthy subjects without asthma. We also hypothesized that individuals with asthma may have increased non-allergic airway inflammation after exposure to NO2. To test these hypotheses, we designed two experiments with the following specific aims: Experiment 1) To determine the effect of a single exposure to NO2 on allergen-induced airway inflammation. Experiment Two: To determine the effect of NO2 exposure on non-allergic airway inflammation. Experiment One: 15 house dust mite (HDM)-sensitive asthmatic subjects were exposed for 3 hours to filtered air or 0.4 ppm NO2 followed immediately by inhalation of HDM allergen. Lung function was measured before and after each exposure and after allergen challenge, hourly for 6 hours. Sputum
The short-term effects of nitrogen dioxide (NO2) on total, cardiovascular and respiratory mortality in 30 European cities participating in the Air Pollution on Health: a European Approach (APHEA)-2 project were investigated.. The association was examined using hierarchical models implemented in two stages. In the first stage, data from each city were analysed separately, whereas in the second stage, the city-specific air pollution estimates were regressed on city-specific covariates to obtain overall estimates and to explore sources of possible heterogeneity.. A significant association of NO2 with total, cardiovascular and respiratory mortality was found, with stronger effects on cause-specific mortality. There was evidence of confounding in respiratory mortality with black smoke and sulphur dioxide. The effect of NO2 on total and cardiovascular mortality was observed mainly in western and southern European cities, and was larger when smoking prevalence was lower and household gas consumption ...
In April 1979, measurements of nitrogen dioxide in the upper atmosphere were made near Soufriere Volcano by twilight optical-absorption techniques. The derived value of 5 x 1015 molecules per square centimeter column implies an enhancement of 25 percent over earlier abundances measured in the same latitudinal regions. This enhancement may represent the normal stratospheric variability of nitrogen dioxide in the equatorial region but in any case may be considered an upper limit to the volcanos effect on the total nitrogen dioxide abundance. ...
NO2 had no toxic effects. A reduced 15N-isotope ratio indicated incorporation of NO2 while nitrate reductase activity in leaves was stimulated. The two nitrogen sources had differential effects on water use efficiency (WUE): NO2 exposure increased long-term WUE; soil N supply decreased WUE; a result not detectable using growth and short-term gas exchange experiments. Plants benefited from airborne NO2, increasing CO2 assimilation rate and biomass; both N sources increased shoot production at the expense of root growth. NO2 exposure induced leaf formation with reduced stomatal density and increased leaf area ...
In cases where the level of nitrogen dioxide in the air exceeds prescribed EU levels and EU countries do not apply to extend the deadline by which those target levels have to be achieved, national courts can "take … any necessary measure" to require authorities responsible for environment policies to take action to abide by those levels, the Court of Justice of the EU (CJEU) said.. The CJEU was ruling in a case referred to it from the UK Supreme Court over a dispute between Defra and an environmental body.. ClientEarth took Defra to court after its draft plans to reduce pollution conceded that 16 air quality zones including Manchester, Birmingham and Glasgow would not comply with limits on the amount of nitrogen dioxide in the air in those areas until 2020. It would take until 2025 for pollution levels in London to come within the limits.. Defra did not apply to the European Commission for more time to conform to EU rules that set out the pollution limits.. The EUs Air Quality Directive ...
In a field as fluid as medicine, publishing a book is not enough. As comprehensive as it is, close reading should raise questions as well as answer them. That is why we have this website, and since that isnt enough either, we have also welcomed the chance to take part in social media, including the Arizona Food Allergy Alliance (AFAA) Facebook book club. One of their close readers asked a question that only makes us feel better about this expansive view of authorship and communication: "In Asthma Allergies Children, you have written about indoor airborne irritants in Chapter 12 (pg. 249 in the ibook). When you write about gas stoves giving off nitrogen dioxide, are you referring to gas ranges for cooking, gas stoves for heating, or both?". Fair enough. Fortunately, the web also makes it easy to appear more knowledgeable than we really are. This is what it says on the EPA website.. "The two most prevalent oxides of nitrogen are nitrogen dioxide (NO2) and nitric oxide (NO). Both are toxic gases ...
The adsorption of nitrogen dioxide on gamma aluminium oxide (γ-Al2O3) and alpha iron oxide (α-Fe2O3) particle surfaces under various conditions of relative humidity, presence of molecular oxygen and UV light has been investigated. X-Ray photoelectron spectroscopy (XPS) is used to monitor the different surfac
Nitrogen dioxide, or NO2, is a brown, highly toxic gas that can be produced by the oxidation of nitrogen (for example, combustion reactions produce NO2 and other oxides of nitrogen, as some of the oxygen reacts with nitrogen in the air) and the reaction of concentrated nitric acid with some metals (examples include copper, silver, and magnesium). Even in extremely low concentrations, the slightest whiff of NO2 will have the same effect on your nasal cavity that Drano has on a clogged sink. Its odor doesn't have a 'flavor' to it, per se, but rather exists as a sharp burning sensation akin to the feeling of having a mixture of wasabi and fire ants shoved up one's nose. Nitrogen dioxide is not to be confused with nitrous oxide, which is more commonly known as laughing gas, and has the formula N2O. Confusing one for the other can often result in fatal consequences.
[116 Pages Report] Check for Discount on United States Nitrogen Dioxide Sterilization Market Report 2016 report by QYResearch Group. Notes: Sales, means the sales volume of Nitrogen Dioxide Sterilization...
The pollutant concentrations on this web page are based on automatically polled data and have not undergone final verification ...
PubMed comprises more than 30 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher web sites.
Anand SS, Vasudevan A, Gupta M, Morrison K, Kurpad A, Teo KK, et al. 2013. Rationale and design of South Asian Birth Cohort (START): a Canada-India collaborative study. BMC Public Health 13:79; doi: 10.1186/1471-2458-13-79.. Bansal N, Ayoola OO, Gemmell I, Vyas A, Koudsi A, Oldroyd J, et al. 2008. Effects of early growth on blood pressure of infants of British European and South Asian origin at one year of age: the Manchester childrens growth and vascular health study. J Hypertens 26:412-418.. Basu R, Harris M, Sie L, Malig B, Broadwin R, Green R. 2014. Effects of fine particulate matter and its constituents on low birth weight among full-term infants in California. Environ Res 128:42-51.. Beelen R, Hoek G, Vienneau D, Eeftens M, Dimakopoulou K, Pedeli X, et al. 2013. Development of NO2 and NOx land use regression models for estimating air pollution exposure in 36 study areas in Europe-the ESCAPE project. Atmos Environ 72:10-23.. Bell ML, Belanger K, Ebisu K, Gent JF, Lee HJ, Koutrakis P, et ...
Air quality in various parts of Chennai - PM 2.5, PM 1.0, carbon dioxide, nitrogen dioxide, sulphur dioxide, particulate Matter in Kathivakkam, Manali, Thiruvottiyur, Kilpauk, Thiyagaraya Nagar, Nungambakkam, Anna Nagar and Adyar and measured by TNPCB.
Ambient nitrogen dioxide (NO2) is derived from oxidized nitrogen oxide (NO) and is generally a marker of combustion related air pollution, including power and chemical plants and traffic emissions. Adverse health effects may come from NO2 itself or its many secondary reaction products including ozone (O3).
The effect of nitrogen dioxide on aerosol formation might not sound like a particularly creative field of study-unless you study chemistry at Reed.. Chem major Danielle Draper 13 just won the coveted Class of 21 Award, recognizing exceptional creativity, initiative, and spontaneity, for her thesis, which looked at how nitrogen dioxide (NO2) emitted by vehicles affects the formation of aerosols, or tiny particles, in forests. It turns out that trees naturally emit gasses-like those responsible for the scent of spruce needles-that turn into aerosols in the atmosphere. Danielle wanted to know how that process was affected by manmade emissions--in other words, how humans are changing the "natural" flow of a forest. In particular, she investigated this reaction as it occured at night, under the cover of darkness.. To conduct her experiments, Danielle had to construct an atmospheric chamber, build a special computer model to study chemical kinetics, and analyze reams of data. Her findings were ...
Objectives: Exposure to fine particles in urban air has been associated with a number of negative health effects. High levels of fine particles have been detected at underground stations in big cities. We investigated the exposure conditions in four occupational groups in the Stockholm underground train system to identify high-exposed groups and study variations in exposure.. Methods: PM1 and PM2.5 were measured during three full work shifts on 44 underground workers. Fluctuations in exposure were monitored by a real-time particle monitoring instrument, pDR, DataRAM. Qualitative analysis of particle content was performed using inductively coupled plasma mass spectrometry. Nitrogen dioxide was measured using passive monitors.. Results: For all underground workers, the geometric mean (GM) of PM1 was 18 mu g/m(3) and of PM2.5 was 37 mu g/m(3). The particle exposure was highest for cleaners/platform workers, and the GM of PM1 was 31.6 mu g/m(3) [geometric standard deviation (GSD), 1.6] and of PM2.5 ...
... definition, a reddish-brown, highly poisonous gas, NO 2 , used as an intermediate in the manufacture of nitric and sulfuric acids, and as a nitrating and oxidizing agent; a major air pollutant from the exhaust of internal combustion engines that are not fitted with pollution control devices. See more.
The UK Government, the Scottish Government, the Welsh Government and the Department of Agriculture, Environment and Rural Affairs (DEFRA) in Northern Ireland are seeking views on a revised Plan to reduce levels of nitrogen dioxide around roads within the shortest possible time - the most immediate air quality challenge.. ...
1810-2219 - Calibration Gas Nitrogen Dioxide 5ppm Balance Nitrogen 58 Liter GAL C-10 Inlet Cylinder (Made by Portagas) (No RFID tag)
The North Carolina Clean Air Act Section 110(l) Noninterference Demonstration for the Removal of Nitrogen Dioxide (NO2) Emissions Control Requirements from Nitric Acid Manufacturing Plants
Aerodyne offers several state-of-the-art optical monitors based on the cavity attenuated phase shift (CAPS) technique. Similar in nature to cavity ringdown (CRD) detection, the method relies on producing very long optical paths (up to 2 km) using very high reflectivity mirrors in a sampling cell that is less than 30 cm in length. However, unlike most CRD-based instruments, these monitors utilize a light emitting diode (LED) as an optical source instead of a laser and measure the resultant signal in the frequency domain using a phase shift measurement. As a result, these monitors can be offered at a very favorable price compared to CRD-based instruments without any loss of performance. CAPS NO2 Monitor. The CAPS NO2 monitor provides a direct absorption measurement of nitrogen dioxide at 450 nm in the blue region of the electromagnetic spectrum. Unlike standard chemiluminescence-based monitors, these instruments require no conversion of NO2 to another species and thus are not sensitive to other ...
At ems, we carry Nitrogen Dioxide SEI 0.5-125 ppm as part of our quality sampling & calibration offerings. Shop now or give us a call!
Get the latest nitrogen dioxide sampling news on Environmental XPRT, the worlds largest environmental industry marketplace and information resource.
The effect of pressure and temperature on the equilibrium between nitrogen dioxide and dinitrogen tetroxide is demonstrated in this experiment.
Local Air Quality Management:. Good air quality is essential for our health, quality of life and the environment. Air becomes polluted when it contains substances which can have a harmful effect on the health of people, animals and vegetation. The main causes of air pollution include transport, domestic combustion and industrial processes.. Under Part IV of the Environment Act 1995 every local authority is required to regularly review and assess the air quality in its area to determine whether the National Air Quality Objectives which are set by the Government are being met. The Council is required to designate an air quality management area (AQMA) where air quality objectives are exceeded.. Currently Selby District Council only monitors Nitrogen dioxide (NO2) levels.. Nitrogen Dioxide (NO2). Nitrogen Dioxide (NO2) is one of a group of highly reactive gases known as oxides of nitrogen or nitrogen oxides (NOx). Other nitrogen oxides include nitrous acid and nitric acid. NO2 is used as the ...
One more study, from La (LA) County, utilized start certification tackle and ASD cases discovered within the Division of Developmental Services in California (Becerra et al. 2013). Using exposure details from the closest checking stations and from the land use regression model (Su et al. 2009), they found a optimistic Affiliation among PM2.5 exposure and autism (OR for every four.sixty eight μg/m3 PM2.5 = one.fifteen; 95% CI: 1.06, 1.24 in a very model of publicity more than the complete pregnancy and also altered for ozone ranges). There was not a constant Affiliation with PM10. The LA study incorporated quite a few more ASD cases than any of another scientific tests, Hence the result estimate could characterize a more stable estimate from the real consequences of PM. Alternatively, differences while in the composition of PM while in the LA space could cause lesser outcomes. Other variances in study structure could also have led to smaller impact measurements in the LA study. The case ...
Progresses and problems of laboratory studies of heterogeneous processes on solid aerosol surfaces are presented in this paper. Heterogeneous reactions on solid aerosol surfaces have attracted great attention because of its ability to affect the concentrations of OH radicals and ozone in the troposphere. Laboratory studies have been extensively carried out to measure the uptake coefficient of trace gases on surrogate surfaces of mineral dust aerosols. The uptake coefficients or the reaction probabilities are necessary in estimating the mass transfer processes around aerosols. Results of model simulations support the importance of laboratory studies of heterogeneous processes. The observed uptake coefficient should be corrected for the physical structures and surface area of the samples. As an example, recent papers reporting the reactions of nitrogen dioxide on solid surfaces are reviewed. Based on the recent studies, thin water films on solid aerosol particles may be quite important in the ...
Proximity analysis and spatial variability of the ambient nitrogen dioxide (NO2) concentration in Rayong province, Thailand, were analyzed using geostatistics and spatial modeling techniques. Annual concentrations of nitrogen dioxide were predicted and spatially interpolated using various interpolation techn
Data & statistics on Average Values Obtained for Different Air Masses and Flow Regimesa: Nitrogen dioxide concentrations for different sectors (Fig.11) averaged for the period 1985-2000 showed the highest values of NO2 in air mass from southwestern and western sectors, i.e. when air mass passed over the highly industrialized countries in, II. Experimentally Obtained Values for the Overall Mass Transfer Coefficient at Melt/Air Interface (Ks) and the Concentration of Hydrogen at the Melt/Air Interface (Ceq)., Lists the results obtained for the simulations without grill in terms of mass flow rate through the air outlet, the mass flow ratio and the discharge coefficient obtained. Cases 1 to 7 refer to a Mach 0.7 external flow, while cases 8,9 and 10 the freestream is at Mach 0.3....
The data shows roadside and background average readings for Nitric Oxide, Nitrogen Dioxide, Oxides of Nitrogen, Ozone, Particulate Matter (PM10 and PM2.5), and Sulphur Dioxide. Measured in Micrograms per Cubic Meter of Air (ug/m3). The spreadsheet shows which Index level each reading falls in, and contains charts showing pollutant levels by time of day per month. Trend graphs of Nitrogen Dioxide and Particulate Matter PM2.5 are on the ... ...
A major deficit of the map is that it only includes nitrogen dioxide. This is only one of many gases that is considered a pollutant by the EPA, and we cannot say that pollution as a whole has increased just because nitrogen dioxide has increased. Another is that the entire country is not pictured. The map is focused on the east coast and specific areas such as the I-95 corridor (Washington, D.C. to New York City). It would be interesting to see how the east coast compares with other sections of the country.. Lastly, its not as up-to-date as I would hope. The last data shown in the map is from 2011; granted, this was only 5 years ago, but obviously we can see from the 2005-2011 progression that a lot can happen in a short amount of time. ...
The objective of this study was to determine whether or not exposure to a low level of nitrogen dioxide could cause cardio-respiratory effects in health elderly people. Ten healthy subjects (67-85 years of age) were exposed to clean air and 300 ppb nitrogen dioxide for 30 minutes while at rest. Pulmonary function measurements assessed were forced expiratory volume in the first second (FEV1), forced vital capacity (FVC), FEV 25-75 and peak flow (PEF). Cardiac function measurements assessed were systolic blood pressure, diastolic blood pressure, heart rate, arterial oxygen saturation and heart rate variability (HRV). Exhaled nitric oxide (NO) and carbon monoxide (CO) concentrations were measured as airway inflammation markers. Baseline measurements were conducted before exposure followed by two post exposures, 1hour after (PE1) and 18 hours after (PE2) exposure.. Paired t-tests were used to compare all the health measurements between air and NO2 exposure. Results of this study showed no ...
Purchase your copy of BS EN ISO 16000-15:2008 as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards available online in electronic and print formats.
A miniature gas chromatography (GC) system was designed and developed using silicon micromachining and integrated circuit (IC) processing techniques. The m
MEaSUREs 2017 project focused on adapting OMI operational algorithms to other satellite instruments to create consistent multi-satellite NO2 products.
The red coloring in the rose is being reduced and turns white. Therefore, the sulfur dioxide is acting as a bleaching agent as well.. SO2 + red rose pigment---, SO42- + reduced pigment (white). Going further: the reduced pigment (white) can be oxidized again by putting the rose in nitrogen dioxide gas. See video below.. reduce pigment (white) + NO2---, NO + oxidized pigment (red) ...
0024-8451 - Bacharach PCA3 265 Portable Combustion Analyzer Kit for Oxygen (O2) 0.1-20.9%, Carbon Monoxide (CO/H2 compensated) 0-4000ppm, Nitric Oxide (NO) 0-3000ppm and Nitrogen Dioxide (NO2) 0-500ppm. Full color display. B-Smart replaceable sensors. Up to ten different fuels. ABS Housing. Alkaline Batteries powered. With Printer. CE Approved.
Warning: This synthesis produces toxic nitrogen dioxide gases and handles corrosive acids. This should be performed in a fume hood with gloves. First get 10...
We simulated commuter routes and long-term exposure to traffic-related air pollution during commute in a representative population sample in Basel (Switzerland), and evaluated three air pollution models with different spatial resolution for estimating commute exposures to nitrogen dioxide (NO2) as a marker of long-term exposure to traffic-related air pollution. Our approach includes spatially and temporally resolved data on actual commuter routes, travel modes and three air pollution models. Annual mean NO2 commuter exposures were similar between models. However, we found more within-city and within-subject variability in annual mean (±SD) NO2 commuter exposure with a high resolution dispersion model (40 ± 7 µg m−3, range: 21-61) than with a dispersion model with a lower resolution (39 ± 5 µg m−3; range: 24-51), and a land use regression model (41 ± 5 µg m−3; range: 24-54). Highest median cumulative exposures were calculated along motorized transport and bicycle routes, and the lowest for
AMANCIO, C.T. and NASCIMENTO, L.F.C.. Association of sulfur dioxide exposure with circulatory system deaths in a medium-sized city in Brazil. Braz J Med Biol Res [online]. 2012, vol.45, n.11, pp.1080-1085. Epub Aug 16, 2012 ISSN 1414-431X. http://dx.doi.org/10.1590/S0100-879X2012007500131.. There is a demonstrable association between exposure to air pollutants and deaths due to cardiovascular diseases. The objective of this study was to estimate the effects of exposure to sulfur dioxide on mortality due to circulatory diseases in individuals 50 years of age or older residing in São José dos Campos, SP. This was a time-series ecological study for the years 2003 to 2007 using information on deaths due to circulatory disease obtained from Datasus reports. Data on daily levels of pollutants, particulate matter, sulfur dioxide (SO2), ozone, temperature, and humidity were obtained from the São Paulo State Environmental Agency. Moving average models for 2 to 7 days were calculated by Poisson ...
TY - JOUR. T1 - Association between nitrogen dioxide and heart rate variability in a susceptible population. AU - Chan, Chang Chuan. AU - Chuang, Kai Jen. AU - Su, Ta Chen. AU - Lin, Lian Yu. PY - 2005/12. Y1 - 2005/12. N2 - BACKGROUND: Panel studies have shown a consistent association between changes in the cardiac autonomic nervous system with particulate matters (PM) but less with gaseous pollutants. This study examined the linkage between nitrogen dioxide (NO2) and heart rate variability (HRV) in a susceptible population. METHODS: We recruited a panel of 83 patients from the National Taiwan University Hospital Cardiology Clinic to measure their 24-h HRV by ambulatory electrocardiography. Thirty-nine patients had coronary heart disease (CHD) and another 44 patients had more than one major CHD risk factor. Ambient concentrations of NO2, sulphur dioxide (SO2), carbon monoxide (CO), ozone, and PM less than 10 μm in diameter (PM10) at each participants close-by monitoring station were used to ...
[115 Pages Report] Check for Discount on Global Nitrogen Dioxide Sterilization Market Research Report 2016 report by QYResearch Group. Notes: Production, means the output of Nitrogen Dioxide Sterilization Revenue,...
Health effects of ambient air pollution were studied in three groups of schoolchildren living in areas (suburban, urban and urban-traffic) with different air pollution levels in EskiAYehir, Turkey. This study involved 1,880 students aged between 9 and 13 years from 16 public primary schools. This two-season study was conducted from January 2008 through March 2009. Symptoms of asthma, rhinitis and eczema were determined by the International Study of Asthma and Allergies in Childhood questionnaire in 2008. Two lung function tests were performed by each child for summer and winter seasons with simultaneous ambient air measurements of ozone (O-3), nitrogen dioxide (NO2) and sulfur dioxide (SO2) by passive sampling. Effects of air pollution on impaired lung function and symptoms in schoolchildren were estimated by multivariate logistic regression analyses. Girls with impaired lung function (only for the summer season evaluation) were more observed in suburban and urban areas when compared to ...
Colorimetric, stain length, personal dosimeters operating by gas diffusion have been developed to determine worker exposure for up to an 8-h period for several inorganic airborne contaminants in the range of their threshold limit values. Length of stain, colorimetric dosimeters have been made for the detection of ammonia (NH3), carbon monoxide (CO), carbon dioxide (CO2), hydrogen sulfide (H2S), nitrogen dioxide (NO2), and sulfur dioxide (SO2) in air. For each gas detection system, the sampler depends on the transfer of the gas by diffusion into a glass tube containing a colorimetric length of stain indicator. The stain length developed in a given period of time is compared to a calibration chart to determine, on the spot, the average gas concentration to which the dosimeter has been exposed. These dosimeters are known by the trade name Vapor Gard. ...
OBJECTIVES: Motor vehicle exhaust fumes are the main source of atmospheric pollution in cities in industrialised countries. They cause respiratory disease and annoy people exposed to them. The relation between ambient exposure to air pollution mainly from motor vehicles and annoyance reactions in a general population was assessed. Also, the importance of factors such as age, sex, respiratory disease, access to the use of a car, and smoking habits on the reporting of these reactions was studied.. METHODS: A postal questionnaire was sent out in 55 urban areas in Sweden that had nearly identical air quality monitoring stations of the urban air monitoring network. From each area, 150 people aged 16-70 were randomly selected. The questionnaire contained questions on perception of air quality as well as a question on how often exhaust fumes were annoying.. RESULTS: Six-monthly nitrogen dioxide concentrations correlated consistently with the prevalence of reported annoyance related to air pollution and ...
Air pollution is the introduction of chemicals, particulate matter, or biological materials that cause harm or discomfort to humans or other living organisms, or damages the natural environment into the atmosphere. Ever since the beginning of the Industrial Revolution in the United States, America has had much trouble with environmental issues, air pollution in particular. According to a 2009 report, around "60 percent of Americans live in areas where air pollution has reached unhealthy levels that can make people sick". Pollution in the United States has plummeted in the recent decade, with pollutants such as nitrogen dioxide decreasing despite the fact the number of vehicles on the road isnt. This is due to better regulations, economic shifts, and technological innovations. With respect to nitrogen dioxide, NASA reported a 32% decrease in New York City and a 42% decrease in Atlanta between the periods of 2005-2007 and 2009-2011. Air pollution can cause a variety of health problems including, ...
TY - JOUR. T1 - A new model of progressive pulmonary fibrosis in rats. AU - Last, Jerold A. AU - Gelzleichter, T. R.. AU - Pinkerton, Kent E. AU - Walker, R. M.. AU - Witschi, H.. PY - 1993. Y1 - 1993. N2 - Sprague-Dawley rats were exposed for 6 h daily to 0.8 ppm of ozone and 14.4 ppm of nitrogen dioxide. Approximately 7 to 10 wk after the initiation of exposure, animals began to demonstrate respiratory insufficiency and severe weight loss. About half of the rats died between Days 55 and 78 of exposure; no overt ill effects were observed in animals exposed to filtered air, to ozone alone, or to nitrogen dioxide. Biochemical findings in animals exposed to ozone and nitrogen dioxide included increased lung content of DNA, protein, collagen, and elastin, which was about 300% higher than the control values. The collagen-specific crosslink hydroxypyridinium, a biomarker for mature collagen in the lung, was decreased by about 40%. These results are consistent with extensive breakdown and remodeling ...
Further analyses are showing the continued low levels of nitrogen dioxide concentrations across Europe - coinciding with lockdown measures implemented to stop the spread of the coronavirus. New data from the Copernicus Sentinel-5P satellite, from the European Union Copernicus programme, show some cities seeing levels fall by 45-50% compared to the same period last year.. ...